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src/components/common/RuntimeResourcePendingMarker.tsx

@@ -0,0 +1,29 @@
+type RuntimeResourcePendingMarkerProps = {
+  source?: string | null;
+  isPending?: boolean;
+  kind?: string;
+};
+
+export const RUNTIME_RESOURCE_PENDING_SELECTOR =
+  '[data-runtime-resource-pending="true"]';
+
+export function RuntimeResourcePendingMarker({
+  source,
+  isPending = true,
+  kind,
+}: RuntimeResourcePendingMarkerProps) {
+  const normalizedSource = source?.trim() ?? '';
+  if (!isPending || !normalizedSource) {
+    return null;
+  }
+
+  return (
+    <span
+      hidden
+      aria-hidden="true"
+      data-runtime-resource-pending="true"
+      data-runtime-resource-src={normalizedSource}
+      data-runtime-resource-kind={kind}
+    />
+  );
+}